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Property, plant and equipment - Property, plant and equipment, Gross (Details) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | $ 23,165 | $ 17,963 |
CAPEX | 9,905 | 9,632 | $ 6,396
Property, plant and equipment at end of period | 28,538 | 23,165 | 17,963
Gross carrying value |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 61,157 | 51,149 |
CAPEX |  | 9,632 |
Currency translation adjustments |  | 1,430 |
Decreases |  | (1,054) |
Property, plant and equipment at end of period |  | 61,157 | 51,149
Gross carrying value | PP&E without materials |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 61,157 |  |
Increase for Tuves Paraguay acquisition | 171 |  |
CAPEX | 9,905 |  |
Currency translation adjustments | 1,775 |  |
Decreases | (870) |  |
Property, plant and equipment at end of period | 72,138 | 61,157 |
Gross carrying value | Land |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 151 | 149 |
Currency translation adjustments | 2 | 2 |
Property, plant and equipment at end of period | 153 | 151 | 149
Gross carrying value | Building |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 1,877 | 1,771 |
Currency translation adjustments | 12 | 11 |
Transfers and reclassifications | 103 | 95 |
Property, plant and equipment at end of period | 1,992 | 1,877 | 1,771
Gross carrying value | Tower and pole |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 1,697 | 1,238 |
Currency translation adjustments | 103 | 82 |
Transfers and reclassifications | 188 | 377 |
Property, plant and equipment at end of period | 1,988 | 1,697 | 1,238
Gross carrying value | Transmission equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 8,010 | 6,880 |
CAPEX | 66 | 64 |
Currency translation adjustments | 189 | 147 |
Transfers and reclassifications | 1,301 | 959 |
Decreases | (58) | (40) |
Property, plant and equipment at end of period | 9,508 | 8,010 | 6,880
Gross carrying value | Mobile network access |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 8,443 | 5,242 |
CAPEX | 26 | 128 |
Currency translation adjustments | 329 | 250 |
Transfers and reclassifications | 2,072 | 3,435 |
Decreases | (467) | (612) |
Property, plant and equipment at end of period | 10,403 | 8,443 | 5,242
Gross carrying value | External wiring |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 11,529 | 10,208 |
Transfers and reclassifications | 1,927 | 1,407 |
Decreases | (1) | (86) |
Property, plant and equipment at end of period | 13,455 | 11,529 | 10,208
Gross carrying value | Switching equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 8,916 | 7,791 |
CAPEX | 64 | 75 |
Currency translation adjustments | 331 | 272 |
Transfers and reclassifications | 255 | 830 |
Decreases |  | (52) |
Property, plant and equipment at end of period | 9,566 | 8,916 | 7,791
Gross carrying value | Power equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 1,727 | 1,449 |
Currency translation adjustments | 76 | 60 |
Transfers and reclassifications | 285 | 220 |
Decreases | (2) | (2) |
Property, plant and equipment at end of period | 2,086 | 1,727 | 1,449
Gross carrying value | Computer equipment and systems |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 11,401 | 9,663 |
CAPEX | 56 | 28 |
Currency translation adjustments | 518 | 408 |
Transfers and reclassifications | 1,311 | 1,304 |
Decreases | (36) | (2) |
Property, plant and equipment at end of period | 13,250 | 11,401 | 9,663
Gross carrying value | Telephony equipment and instruments |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 845 | 806 |
CAPEX | 4 |  |
Currency translation adjustments | 3 | 3 |
Transfers and reclassifications | 51 | 37 |
Decreases |  | (1) |
Property, plant and equipment at end of period | 903 | 845 | 806
Gross carrying value | Handsets lent to customers at no cost |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 543 | 505 |
Increase for Tuves Paraguay acquisition | 171 |  |
CAPEX | 56 | 54 |
Currency translation adjustments | 97 | 99 |
Decreases | (50) | (115) |
Property, plant and equipment at end of period | 817 | 543 | 505
Gross carrying value | Equipment lent to customers at no cost |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 267 | 190 |
CAPEX | 224 | 150 |
Transfers and reclassifications | 10 | 3 |
Decreases | (126) | (76) |
Property, plant and equipment at end of period | 375 | 267 | 190
Gross carrying value | Vehicles |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 429 | 380 |
CAPEX | 130 | 56 |
Currency translation adjustments | 9 | 7 |
Decreases | (23) | (14) |
Property, plant and equipment at end of period | 545 | 429 | 380
Gross carrying value | Furniture |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 202 | 165 |
CAPEX | 3 | 2 |
Currency translation adjustments | 11 | 9 |
Transfers and reclassifications | 18 | 26 |
Property, plant and equipment at end of period | 234 | 202 | 165
Gross carrying value | Installations |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 1,172 | 905 |
Currency translation adjustments | 17 | 15 |
Transfers and reclassifications | 324 | 252 |
Property, plant and equipment at end of period | 1,513 | 1,172 | 905
Gross carrying value | Improvements in third parties buildings |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 755 | 574 |
CAPEX | 4 | 8 |
Currency translation adjustments | 53 | 40 |
Transfers and reclassifications | 55 | 133 |
Property, plant and equipment at end of period | 867 | 755 | 574
Gross carrying value | Special projects |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 89 | 77 |
Transfers and reclassifications | 32 | 12 |
Property, plant and equipment at end of period | 121 | 89 | 77
Gross carrying value | Construction in progress |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 2,915 | 3,015 |
CAPEX | 9,237 | 9,022 |
Currency translation adjustments | 25 | 22 |
Transfers and reclassifications | (7,932) | (9,090) |
Decreases | (107) | (54) |
Property, plant and equipment at end of period | 4,138 | 2,915 | 3,015
Gross carrying value | Asset retirement obligations |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 189 | 141 |
CAPEX | 35 | 45 |
Currency translation adjustments |  | 3 |
Property, plant and equipment at end of period | $ 224 | $ 189 | $ 141

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- Definition The increase in property, plant and equipment resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_iii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_viii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_a&doctype=Standard -URIDate 2017-03-09 + Details
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